Recording apparatus and transport method

ABSTRACT

A recording apparatus includes: a transport mechanism that transports a recording medium having a lenticular lens in a transport direction; and a guide that includes a convex portion formed along the transport direction and guides the recording medium in the transport direction by allowing the convex portion to come in contact with the lenticular lens.

BACKGROUND

Priority is claimed under U.S.C. §119 to Japanese Application No.2009-075118 filed on Mar. 25, 2009, which is hereby incorporated byreference in its entirety.

1. Technical Field

The present invention relates to a recording apparatus and a transportmethod.

2. Related Art

There is known a technique of disposing images on a rear side of alenticular lens for obtaining a stereoscopic image or an image thatchanges its picture depending on a viewing angle. When such an image isto be obtained, the image is stuck to the rear side of the lenticularlens. However, directly recording the image on the rear side of thelenticular lens has been also performed.

The image (lenticular image) on the rear side of the lenticular lensneeds to be fitted to a lens arrangement of the lenticular lens withgood precision. Accordingly, even in the case where the image isrecorded to the rear side of the lenticular lens, position adjustmentbetween the lenticular lens and the image with good precision is needed.

In Japanese Patent No. 3,471,930, there is disclosed a technique ofdetecting a position of a lenticular lens using a sensor and performingrecording at a predetermined position on the basis of the detectionresult. In JP-A-2007-130769, there is disclosed a technique ofimplementing a countermeasure against a position deviation on a tray ofa recording medium placed on the transport tray for enhancing precisionof a recording position.

In Japanese Patent No. 3,471,930, a sensor for detecting the position ofthe lenticular lens is needed, so that costs for the apparatus increase.In Japanese JP-A-2007-130769, even the position deviation of therecording medium with respect to the transport tray is suppressed, whenthe transport tray is transported while being inclined with respect to atransport direction, the precision of the image recording position onthe recording medium is degraded.

SUMMARY

An advantage of some aspects of the invention is that it enhancesprecision of a recording position with a simple configuration.

According to an aspect of the invention, there is provided a recordingapparatus including: a transport mechanism that transports a recordingmedium having a lenticular lens in a transport direction; and a guidethat includes a convex portion formed along the transport direction andguides the recording medium in the transport direction by allowing theconvex portion to come in contact with the lenticular lens.

Other features of the invention will be clarified by the specificationand the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be described with reference to the accompanyingdrawings, wherein like numbers reference like elements.

FIG. 1A is an enlarged cross-sectional view of a lens sheet, FIG. 1B isa view of the lens sheet viewed from a lenticular lens, and FIG. 1C isan explanatory view of another lens sheet.

FIG. 2 is a block diagram for explaining a schematic configuration of arecording apparatus.

FIG. 3 is a rear perspective view of the recording apparatus.

FIG. 4 is an enlarged view of a portion IV shown in FIG. 3.

FIG. 5A is a top plan view of a lens sheet which is placed obliquelywith respect to a guide, FIG. 5B is a cross-sectional view taken alongthe line VB-VB of FIG. 5A, and FIG. 5C is a cross-sectional view takenalong the line VC-VC of FIG. 5A.

FIG. 6A is a schematic explanatory view of an arrangement of the guideof FIG. 3,

FIG. 6B is an explanatory view of an arrangement of a guide of a firstmodified example, FIG. 6C is an explanatory view of an arrangement of aguide of a second modified example, FIG. 6D is an explanatory view of anarrangement of a guide of a third modified example, FIG. 6E is anexplanatory view of an arrangement of a guide of a fourth modifiedexample, and FIG. 6F is an explanatory view of an arrangement of a guideof a fifth modified example.

FIG. 7A is an explanatory view of a cross-sectional shape of anengagement portion of the guide of FIG. 3, FIG. 7B is an explanatoryview of a cross-sectional shape of an engagement portion of a firstmodified example, FIG. 7C is an explanatory view of a cross-sectionalshape of an engagement portion of a second modified example, FIG. 7D isan explanatory view of a cross-sectional shape of an engagement portionof a third modified example, and FIG. 7E is an explanatory view of across-sectional shape of an engagement portion of a fourth modifiedexample.

FIG. 8A is an explanatory view of an end surface on the upstream side ofa transport direction of the guide of FIG. 3, and FIG. 8B is anexplanatory view of a modified example of a shape of the end surface ofthe guide.

FIG. 9A is an explanatory view of a shape of an end portion of theengagement portion of the guide of FIG. 3, and FIGS. 9B to 9E areexplanatory views of modified examples of shapes of end portions ofconvex portions of engagement portions.

FIG. 10 is a top plan view of a part of a guide of a modified example.

FIG. 11A is an explanatory view of a first modified example of thenumber of convex portions, FIG. 11B is an explanatory view of a secondmodified example of the number of convex portions, FIG. 11C is anexplanatory view of a third modified example of the number of convexportions, and FIG. 11D is an explanatory view of a fourth modifiedexample of the number of convex portions.

FIG. 12A is a top plan view of the guide of FIG. 6C, FIG. 12B is anexplanatory view of a first modified example of a formation position ofthe convex portions, and FIG. 12C is an explanatory view of a secondmodified example of the formation position of the convex portions.

FIG. 13A is a view of the guide viewed in the transport direction, FIG.13B is a schematic explanatory view of a transport position of the lenssheet, and FIG. 13C is a schematic explanatory view of a transportposition of a normal sheet.

FIG. 14 is an explanatory view of an example of a pressing roller forthe guide of FIG. 12C.

FIG. 15A is an explanatory view of a modified example of the pressingroller provided with convex portions on its surface, and FIG. 15B is anexplanatory view of another modified example of the pressing rollerprovided with convex portions on its surface.

FIG. 16A is an explanatory view of a first modified example of thepressing roller,

FIG. 16B is an explanatory view of a second modified example of thepressing roller, and FIG. 16C is an explanatory view of a third modifiedexample of the pressing roller.

FIG. 17 is an explanatory view of an image for inspection.

FIG. 18 is an explanatory view of the image for inspection viewed fromthe lenticular lens.

FIG. 19A is an explanatory view of a recording apparatus having an ASF,and FIG. 19B is an explanatory view of a recording apparatus having anopenable and closable feed cassette.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

At least, the following features are clarified by the specification andthe accompanying drawings.

A recording apparatus includes: a transport mechanism that transports arecording medium having a lenticular lens in a transport direction; anda guide that includes a convex portion formed along the transportdirection and guides the recording medium in the transport direction byallowing the convex portion to come in contact with the lenticular lens.In the recording apparatus, it is possible to enhance precision in arecording position with a simple configuration.

A pressing member that presses the recording medium against the guidemay be included. Accordingly, the movement of the recording medium in adirection crossing the transport direction is limited, so that it ispossible to enhance the precision in the recording position.

The pressing member may exert a pressing force on the recording mediumwhich is being transported in the transport direction. Accordingly, itis possible to prevent skewing even when the recording medium isinclined with respect to the guide.

A transport roller that is rotated to transport the recording medium inthe transport direction may serve as the pressing member. Accordingly,the transport roller and the pressing member may be implemented for acombined use.

The transport mechanism may have a transport roller that is rotated totransport the recording medium in the transport direction, and thepressing member may be provided on the upstream side of the transportdirection from the transport roller. Accordingly, since the transportroller is positioned in the vicinity of the recording position, so thatit is possible to achieve a decrease in side of the apparatus.

The transport mechanism may have a transport roller that is rotated totransport the recording medium in the transport direction, and thepressing member may be provided between a recording position on thedownstream side of the transport direction from the transport roller andthe transport roller. Accordingly, the guide can guide the recordingmedium at a position close to the recording position, so that it ispossible to enhance the precision in the recording position.

A length in the transport direction of the guide may be shorter than alength in the transport direction of the recording medium. Accordingly,it is possible to achieve a decrease in the size of the apparatus.

An end surface in the transport direction of the guide is an inclinedsurface, and when the upper end of the recording medium beingtransported toward the guide comes in contact with the inclined surface,the inclined surface may guide the upper end toward a side where theconvex portion of the guide is formed. Accordingly, the recording mediumis less likely to be jammed.

An end portion of the convex portion on the upstream side of thetransport direction may be narrowed as it goes to the upstream side ofthe transport direction. Accordingly, the recording medium is lesslikely to become jammed.

The guide may have a plurality of the convex portions, and the pluralityof the convex portions may extend at an interval which is an integermultiple of a lens pitch of the lenticular lens. Accordingly, it ispossible to enhance the precision in the recording position with asimple configuration.

The guide may be used for guiding recording media with a plurality ofsizes, and the convex portion may be formed at a position where therecording medium with the minimum size passes through. Accordingly, itis possible to enhance the precision in the recording position of arecording medium with any size.

When the recording medium having the lenticular lens is to be recorded,the recording medium may be transported to pass through a portion wherethe convex portion is formed, and when a recording medium without alenticular lens is to be recorded, the recording medium may betransported to pass through a portion where the convex portion is notformed. Accordingly, a mark from the convex portion does not remain onthe recording medium without the lenticular lens.

A transport method includes: allowing a convex portion formed along atransport direction to come in contact with a lenticular lens of arecording medium having the lenticular lens; and transporting therecording medium in the transport direction while allowing the convexportion to come in contact with the lenticular lens. In the recordingmethod, it is possible to enhance precision in a recording position witha simple configuration.

Lens Sheet

First, a lens sheet which is a recording medium having a lenticular lenswill be described.

FIG. 1A is an enlarged cross-sectional view of a lens sheet, FIG. 1B isa view of the lens sheet viewed from a lenticular lens, and FIG. 1C isan explanatory view of another lens sheet.

The lens sheet L includes a lenticular lens 7 and an image formationlayer 8.

The lenticular lens 7 is an optical member (cylindrical lens array) madeof resin, which is formed by arranging a number of cylindrical lenses 13in a sheet surface direction. In the following description, a generatrixdirection of the cylindrical lens 13 is referred to as the “xdirection”, and a direction in which the cylindrical lens 13 extends isreferred to as the “y direction” (x and y are lowercase letters). Inaddition, a portion of each cylindrical lens 13 which protrudes most maybe called a “peak”, a convex portion between the cylindrical lenses maybe called a “valley”, a line connecting the peaks may be called a“ridge”, and the direction parallel to the ridge may be called the“generatrix direction”.

The image formation layer 8 includes an ink transmission layer 8A and anink absorption layer 8B. The ink transmission layer 8A is positioned onan outside of the lens sheet L, and the ink absorption ink 8B isinterposed between the ink transmission layer 8A and the lenticular lens7. When an image is recorded from a side of the image formation layer 8of the lens sheet L in an ink jet recording method, ink transmits theink transmission layer 8A and is absorbed by the ink absorption layer8B, so that the image is recognizable through the lenticular lens 7.

The image formation layer 8 of the lens sheet L may not be included. Forexample, when an ultraviolet curable ink is used, an image can bedirectly recorded on the rear side of the lenticular lens 7 without theink transmission layer 8A or the ink absorption layer 8B.

A recording apparatus according to this embodiment described latertransports the lens sheet L along the generatrix direction (x direction)of the lenticular lens 7 using a shape of the lenticular lens 7.Specifically, convex portions are provided on a guide (described later)along a transport direction, and the lens sheet L is transported toslide as the convex portions are engaged with the valleys between thecylindrical lenses, so that the transport direction of the recordingapparatus and the generatrix direction (x direction) of the lens arealigned with each other.

Accordingly, with regard to a recording position (a position at which ahead ejects ink to form an image) of the recording apparatus, theposition of each cylindrical lens 13 of the lenticular lens 7 isdetermined to a predetermined position. As a result, it is possible torecord an image with good precision in a lens array of the lenticularlens 7.

In FIG. 1B, a direction of a side of the lens sheet L is aligned withthe x direction or the y direction. Here, as illustrated in FIG. 1C,there may be a case where a direction of a side of a lens sheet L is notaligned with the x direction or the y direction due to a type of thelens sheet L or manufacturing precision of the lens sheet L. Therecording apparatus of this embodiment can align the lens sheet L asillustrated in FIG. 1C with the transport direction of the recordingapparatus or the generatrix direction (x direction) of the lens, therebyrecording an image in the lens array of the lenticular lens 7 with goodprecision.

Even in the case as illustrated in FIG. 1B, next to the lens sheet L,the peak of the cylindrical lens 13 may be positioned, or the valleythereof may be positioned. In the recording apparatus of thisembodiment, regardless of whether the peak or the valley of thecylindrical lens 13 is positioned at the side of the lens sheet L, theposition of each cylindrical lens 13 of the lenticular lens 7 isdisposed to the predetermined position.

Embodiment Overview of Recording Apparatus

FIG. 2 is a block diagram for explaining a schematic configuration of arecording apparatus. FIG. 3 is a rear perspective view of the recordingapparatus. In FIG. 3, a transport direction of the recording apparatus100 is referred to as the X direction, a main scanning direction of ahead is referred to as the Y direction, and a vertical direction isreferred to as the Z direction (X, Y, and Z are uppercase letters). Asdescribed later, the X direction (the transport direction of therecording apparatus 100) and the x direction (the generatrix directionof the lens of the lens sheet L) are aligned with each other.

A computer 110 which is an external apparatus generates an image to berecorded by the recording apparatus 100 and transmits data for recordingto the recording apparatus 100. In a case where recording is performedon the lens sheet L, the computer 110 generates an image for recordingby processing and synthesizing a plurality of images designated by auser according to a lens pitch or the like and transmits data forrecording to perform recording on the image to the recording apparatus100. Otherwise, the recording apparatus 100 may have a function ofgenerating the data for recording.

The recording apparatus 100 performs recording on a medium on the basisof the data for recording which is received from the computer 110. Inthe case where recording is performed on the lens sheet L, the image isrecorded on a rear side of the lens sheet L on the basis of the data forrecording which is generated according to the lens pitch.

The recording apparatus 100 includes a housing 2, a guide 3, a transportroller 4, a discharge roller 5, a head 6, and the like. The housing 2 isan outercasing member of the recording apparatus 100. The guide 3supports the lens sheet L and guide the lens sheet L in the transportdirection. The transport roller 4 and the discharge roller 5 transportthe lens sheet L placed on the guide 3 in the transport direction. Thehead 6 performs records on the lens sheet L.

The housing 2 is provided with a feed opening portion 9 and a dischargeopening portion 10. The lens sheet L supplied from the feed openingportion 9 is transported by the transport roller 4 and the dischargeroller 5 in the transport direction, is subjected to the recording bythe head 6, and is discharged from the recording apparatus 100 throughthe discharge opening portion 10.

The guide 3 is placed under the transport roller 4 and the dischargeroller 5, and the overall shape thereof shows a rectangular plate shape.The guide 3 has a length extending from a position protruding from thefeed opening portion 9 to a position between the discharge openingportion 10 and the discharge roller 5 with respect to the transportdirection. In addition, the guide 3 has a width for supporting theentire width of the lens sheet L with respect to the Y direction (or thewidth direction of the lens sheet L).

The transport roller 4 and the discharge roller 5 are disposed in thefront and in the rear of the head 6, respectively. The transport roller4 is a roller for transporting the lens sheet L supplied from the feedopening portion 9 to a recording position (a position at which the head6 performs recording). The discharge roller 5 is a roller fordischarging the lens sheet L subjected to the recording at the recordingposition to the discharge opening portion 10. The transport roller 4 isrotated by a transport motor 16, and the discharge roller 5 is rotatedby a discharge motor 17.

The head 6 is a recording head in an ink jet type for ejecting ink andmounted to a lower surface of a carriage 18. The carriage 18 issupported to move in the Y direction by a carriage guide 19 providedalong the Y direction and is fixed to a timing belt 21 driven by acarriage motor 20. Accordingly, when the timing belt 21 is rotated bythe carriage motor 20, the head 6 is reciprocated in the Y directionalong with the carriage 18.

A controller controls transportation of the lens sheet L in thetransport direction by controlling the transport motor 16 and thedischarge motor 17. In addition, the controller controls movement of thehead 6 by controlling the carriage motor 20. In addition, the controllercontrols ejection of ink from the head 6. Accordingly, the controllercan record an image on the lens sheet L at a desired position. Inaddition, when recording is to be performed on the lens sheet L, thelens sheet L is placed on the guide 3 so that a side of the imageformation layer 8 is opposed to the head 6 and a side of the lenticularlens 7 comes in contact with the guide 3. Accordingly, the head 6performs recording on the image formation layer 8 such that the imagerecorded on the image formation layer 8 is recognizable from the side ofthe lenticular lens 7, thereby manufacturing a recorded product.

Configuration of Guide

FIG. 4 is an enlarged view of a portion IV shown in FIG. 3.

The guide 3 includes a plate-shaped substrate 11 and an engagementportion 12. The engagement portion 12 has the same shape as thelenticular lens 7 and is provided on the substrate 11. That is, convexportions 14 striated in the same pattern as that of the cylindricallenses 13 extend at the same pitch as the lens pitch. For this reason,the engagement portion 12 may be formed by turning the lenticular lens 7over. Since the shape of the engagement portion 12 is the same as thelenticular lens 7, here, a portion of the convex portion 14 of theengagement portion 12 which protrudes most may be called a “peak”, aconcave portion between the convex portions 14 may be called a “valley”,a line connecting the peaks may be called a “ridge”, and a directionparallel to the ridge may be called a “generatrix direction”.

The guide 3 is mounted in the recording apparatus 100 so that a positionthereof is adjusted to align the generatrix direction of the striatedconvex portion 14 with the transport direction (X direction) of therecording apparatus 100. In addition, the striated convex portions 14are arranged side by side across the width greater than the width of thelens sheet L.

Since the engagement portion 12 has the same shape as the lenticularlens 7, when the lens sheet L is placed on the guide 3 so that the sideof the lenticular lens 7 faces down, the cylindrical lenses 13 of thelenticular lens 7 are engaged with the convex portions 14 of the guide3. Therefore, the convex portion 14 of the guide 3 is positioned betweenthe peaks of the cylindrical lenses 13, and the peak of the cylindricallenses 13 is positioned between the convex portions 14 of the guide 3.As a result, the movement of the lens sheet L in the Y direction islimited with respect to the guide 3, so that the position thereof isdetermined in the Y direction. On the other hand, there is no limitationto the movement of the convex portion 14 in the generatrix direction (adirection perpendicular to the plane of FIG. 4, that is, X direction),so that the lens sheet L can be transported along the transportdirection which is the generatrix direction of the convex portion 14 ofthe guide 3. That is, the guide 3 guides the lens sheet L in thetransport direction while restricting the movement in the Y direction ofthe lens sheet L.

Skew Prevention by Pressing Force

There may be a case where the lens sheet L is placed on the guide 3obliquely. That is, there may be a case where the lens sheet L is placedon the guide 3 in a state where the transport direction (X direction) ofthe recording apparatus 100 and the generatrix direction (x direction)of the lens of the lens sheet L are not aligned with each other. In thisstate, the position of the lens sheet L is not determined in the Ydirection. However, even in this case, the lens sheet L is transportedwhile pressing the guide 3, so that it is possible prevent the lenssheet L from skewing while being transported.

Two lens sheets are prepared, and at first, lens faces thereof areoverlapped to face each other in a state (in a state where peaks oflenses are not engaged with each other) where generatrix directions ofthe two lens sheets are disposed to intersect with each other. Then, inthis state, when the two lens sheets are slipped (rubbed together), thegeneratrix directions of the two lens sheets are aligned with eachother, and thus the peaks of the lenses are engaged with each other. Byusing this phenomenon, skew prevention is performed as the recordingapparatus 100 of this embodiment transports the lens sheet L whilepressing it on the guide 3 is achieved.

FIG. 5A is a top plan view of a lens sheet which is placed obliquelywith respect to the guide 3, FIG. 5B is a cross-sectional view takenalong the line VB-VB of FIG. 5A, and FIG. 5C is a cross-sectional viewtaken along the line VC-VC of FIG. 5A. In FIG. 5A, the positions of thepeaks of the guide 3 and the lens are shown by dotted lines, thepositions of the valleys thereof are shown by full lines, the guide 3 isshown by thick lines, and the lens is shown by thin lines. For theconvenience of the description, the number of peaks or valleys isreduced.

When the lens sheet L is disposed obliquely with respect to the guide 3as illustrated in FIG. 5A, in some areas, the peaks of the lens sheet Land the guide 3 may come in contact with each other as illustrated inFIG. 5B. Therefore, as compared with the state of FIG. 4, the gapbetween the lens sheet L and the guide 3 is large. Accordingly, asillustrated in FIG. 5C, portions where the peak of the lens sheet L isspaced from the guide 3 occur. When a pressing force is exerted on aposition of the VC-VC cross-section of the state of FIG. 5C, the lenssheet L is bent so that the peak of the lens sheet L is fitted into thevalley of the guide 3 as illustrated in FIG. 4. As a result, when thepressing force is exerted on the position of the VC-VC cross-section,the movement in the left and right direction (Y direction) of the lenssheet L is limited at the position of the VC-VC cross-section.

When the lens sheet L is transported in the transport direction in thisstate, a position where the pressing force is exerted deviates from theposition of the VC-VC cross-section. As a result, even at the positiondeviating from the VC-VC cross-section, as illustrated in FIG. 4, thepeak of the lens sheet L is fitted into the valley of the guide 3. Here,while the state as illustrated in FIG. 4 is maintained at the positionof the VC-VC cross-section, in order to achieve the state as illustratedin FIG. 4 at the position deviating from the VC-VC cross-section, at aposition (see FIGS. 5A and 5B) where the peak of the lens sheet L andthe peak of the guide 3 come in contact with each other as illustratedby the VB-VB cross-section, the peak of the lens sheet L slips along thevalley of the guide 3 (in this case, the peak of the lens sheet L slipsto the right). Accordingly, the lens sheet L is rotated toward adirection (the counterclockwise direction in FIG. 5A) to solve skewing,thereby correcting skewing (the generatrix direction of the lens sheet Lis aligned with the generatrix direction of the guide 3).

When skewing is corrected and the peak of the lens sheet L and the peakof the guide 3 are engaged with each other once, the rotational movementof the lens sheet L is already restricted, and a force exerted in arotation direction relative to the lens sheet L does not occur. Inaddition, when a pressing force is exerted on the lens sheet L in thestate where the peak of the lens sheet L and the peak of the guide 3 areengaged with each other, the gap between the lens sheet L and the guide3 does not become empty, and the movement of the lens sheet L withrespect to the guide 3 is limited only to the X direction, therebycontinuously preventing skewing.

In this embodiment, the transport roller 4 transports the lens sheet Lwhile pressing it on the guide 3 with a spring element (a spring element4A of FIG. 6A). Accordingly, skewing of the lens sheet L is prevented,so that the X direction (the transport direction of the recordingapparatus 100) is aligned with the x direction (the generatrix directionof the lens of the lens sheet L). In addition, in this embodiment, thedischarge roller 5 also transports the lens sheet L while pressing it onthe guide 3 with a spring element. Accordingly, even though a rear endof the lens sheet L passes through a position of the transport roller 4,skewing of the lens sheet L is continuously prevented, so that the Xdirection and the x direction are aligned with each other.

Modified Examples of Guide About Displacement

FIG. 6A is a schematic explanatory view of an arrangement of the guideof FIG. 3. The above-mentioned guide 3 has a length extending from theposition protruding from the feed opening portion 9 to the positionbetween the discharge opening portion 10 and the discharge roller 5 withrespect to the transport direction.

However, the arrangement of the guide 3 is not limited to thisconfiguration. Hereinafter, modified examples of the arrangement of theguide 3 will be described.

FIG. 6B is an explanatory view of an arrangement of a guide of a firstmodified example. This guide 3 has a length extending from the positionprotruding from the feed opening portion 9 only to a positionimmediately in front of the transport roller 4 with respect to thetransport direction. Even with regard to the guide 3, since the lenssheet L is transported while the position of the lens sheet L isdetermined by the convex portion 14 formed along the transportdirection, skewing of the lens sheet L is prevented, and the X direction(the transport direction of the recording apparatus 100) and the xdirection (the generatrix direction of the lens of the lens sheet L) arealigned with each other. In addition, in this modified example, sincethe guide 3 has the length extending only to the position in front ofthe transport roller 4, a pressing roller 24 which is different from thetransport roller 4 is provided, and the pressing roller 24 presses thelens sheet L against the guide 3 with a spring element 24A. As describedabove, the pressing roller 24 for pressing the lens sheet L against theguide 3 may not need to be used as the transport roller 4.

In addition, in FIG. 6A, the guide 3 supports the lens sheet L at aposition opposed to the head 6. However, in FIG. 6B, a platen 23 isprovided in addition to the guide 3 in order to support the lens sheet Lat the position opposed to the head 6.

FIG. 6C is an explanatory view of an arrangement of a guide of a secondmodified example. This guide 3 does not exist at the position protrudingfrom the feed opening portion 9 and is provided at a position opposed tothe pressing roller 24. This guide 3 has a shortened length in thetransport direction.

FIG. 6D is an explanatory view of an arrangement of a guide of a thirdmodified example. This guide 3 is provided between the transport roller4 and the head 6 with respect to the transport direction. In otherwords, the guide 3 is provided between the transport roller 4 and theplaten 23 with respect to the transport direction. Even this guide 3 canguide the lens sheet L transported from the transport roller 4 whiledetermining the position of the lens sheet L, so that skewing of thelens sheet L is prevented, and the X direction (the transport directionof the recording apparatus 100) and the x direction (the generatrixdirection of the lens sheet L) are aligned with each other.

In addition, in the configuration of FIG. 6D, as compared with theconfiguration of FIG. 6C, since the guide 3 guides the lens sheet L at aposition close to the recording position, the guide 3 can determine theposition of the lens sheet L to the recording position with goodprecision. In the configuration of FIG. 6C, the transport roller 4 whichis rotated by the transport motor 16 is provided near the recordingposition, so that a decrease in the size of the apparatus can beachieved.

FIG. 6E is an explanatory view of an arrangement of a guide of a fourthmodified example. A feeding portion 25 accommodates a number of lenssheets L stacked. The guide 3 may be provided on a feeding path betweenthe feeding portion 25 and the transport roller 4. In the figure, theguide 3 is provided immediately in the rear of the feeding portion 25.Even when the guide 3 guides the lens sheet L at this position, skewingof the lens L is prevented, and it is possible to align the X direction(the transport direction of the recording apparatus 100) and the xdirection (the generatrix direction of the lens of the lens sheet L)with each other.

FIG. 6F is an explanatory view of an arrangement of a guide of a fifthmodified example. As described above, the guide 3 may be provided on thedownstream side of the transport direction from the head 6. When theguide 3 is provided at this position, the guide 3 can guide the lenssheet L even after the rear end of the lens sheet L passes through thetransport roller 4.

About Shape of Engagement Portion (1)

FIG. 7A is an explanatory view of a cross-sectional shape of theengagement portion of the guide of FIG. 3. The above-mentioned guide 3has the same shape as the lenticular lens 7.

Here, the engagement portion 12 of the guide 3 is not limited to theshape. Hereinafter, modified examples of the shape of the engagementportion 12 of the guide 3 will be described. In addition, any engagementportion 12 described later has the convex portion 14 along the transportdirection as illustrated in FIG. 7A.

FIG. 7B is an explanatory view of a cross-sectional shape of anengagement portion of a first modified example. The cross-sectionalshape of the engagement portion 12 of the first modified example isopposite to the shape of the lenticular lens 7. In other words, theconvex portion 14 of the engagement portion 12 of the first modifiedexample has a shape corresponding to the concave portion of lenticularlens 7. Accordingly, center of curvature of the convex portion 14 inFIG. 7A is inside (lower side) the engagement portion 12, however,center of curvature of the convex portion 14 of the engagement portion12 of the first modified example is outside (upper side) the engagementportion 12. The engagement portion 12 of the first modified example canstrengthen the restriction of the lens sheet L in the Y direction.

FIG. 7C is an explanatory view of a cross-sectional shape of anengagement portion of a second modified example. The engagement portion12 of the second modified example does not have a curved surface, andthe cross-section of the convex portion 14 is a triangular. Even by theshape, the lens sheet L can be restricted in the Y direction.

FIG. 7D is an explanatory view of a cross-sectional shape of anengagement portion of a third modified example. The engagement portion12 of the third modified example has an interval between the convexportions 14, which is twice as illustrated in FIGS. 7A to 7C. Asdescribed above, even in the case where pitches between the convexportion 14 are integer multiples of the lens pitch p, the convex portion14 of the guide 3 is positioned at the valley of the cylindrical lens 13when the lens sheet L is placed on the guide 3, so that the movement inthe Y direction of the lens sheet L is limited by the guide 3, therebydetermining the position of the lens sheet L in the Y direction.

FIG. 7E is an explanatory view of a cross-sectional shape of anengagement portion of a fourth modified example. In the engagementportion 12 of the third modified example, the convex portion 14 has arectangular cross-section. Even in this shape, the lens sheet L can berestricted in the Y direction. Here, the engagement portions 12illustrated in FIGS. 7A to 7D are less likely to cause gaps between thelenses as compared with the engagement portion 12 illustrated in FIG. 7Eand thus have high position determination precision.

About Shape of Engagement Portion (2)

FIG. 8A is an explanatory view of an end surface on the upstream side ofa transport direction of the guide of FIG. 3. As illustrated in FIG. 8A,in the case where a normal direction of the end surface 3A of the guide3 is the transport direction (X direction), when the lens sheet L istransported toward the guide 3, an upper end of the lens sheet L runsagainst the end surface 3A of the guide 3 and the sheet L is more likelyto be jammed.

FIG. 8B is an explanatory view of a modified example of a shape of theend surface of the guide. In this modified example, the end surface ofthe guide 3 is an inclined surface such that a normal direction of theend surface 3B of the guide 3 on the upstream side of the transportdirection has a Z direction component. Accordingly, when the upper endof the lens sheet L runs against the end surface 3B of the guide 3, theupper end of the lens sheet L is guided upwardly, so that the sheet isless likely to be jammed.

In addition, as described above with reference to FIGS. 6C to 6F, in theconfiguration in which the lens sheet L is transported from the upstreamside of the transport direction from the guide 3, the modified exampleillustrated in FIG. 8B is more advantageous.

About Shape of Engagement Portion (3)

FIG. 9A is an explanatory view of a shape of an end portion of theengagement portion of the guide of FIG. 3. As illustrated in FIG. 9A, ina case where the cross-sectional shape of the engagement portion 12 isuniform as it goes to the end portion, when the lens sheet L istransported toward the guide 3, the upper end of the lens sheet L runsagainst the convex portion 14 of the engagement portion 12 and the sheetis more likely to be jammed.

Therefore, as illustrated in FIG. 9B to 9E, the convex portion 14 of theengagement portion 12 may be narrowed toward the upstream side of thetransport direction. Accordingly, the end of the convex portion 14 ofthe engagement portion 12 is easily inserted between the peaks of thelens sheets L transported and guides the peaks of the lens sheet L tothe valley of the engagement portion 12, thereby easily guiding thevalley of the lens sheet L to the peak of the engagement portion 12.

In addition, as described above with reference to FIGS. 6C to 6F, in theconfiguration in which the lens sheet L is transported from the upstreamside of the transport direction from the guide 3, the modified examplesillustrated in FIGS. 9B to 9E are more advantageous.

About Shape of Engagement Portion (4)

The above-mentioned convex portions 14 have shapes striated along the Xdirection (transport direction). However, the shape of the convexportion 14 is not limited to the striation.

FIG. 10 is a top plan view of a part of a guide of a modified example. Anumber of hemispherical protrusions are provided in the engagementportion 12 in a square lattice. An interval between the protrusions 34is equal to the lens pitch p of the lenticular lens 7. In other words,in this modified example, a number of the protrusions 34 are providedalong the transport direction, the convex portions 14 are formed alongthe transport direction, and the convex portions 14 extend at the sameinterval as the lens pitch p. Even by this guide 3, the lens sheet L canbe transported in the X direction while being restricted in the Ydirection.

In addition, the shape of the protrusion 34 in this modified example ishemispherical, however, may be conical or pyramidal. In addition, theinterval between the protrusions in the Y direction may not necessarilybe the same as the lens pitch p of the lenticular lens 7 and may be aninteger multiple of the lens pitch. In addition, the protrusions 34 maynot be aligned in the Y direction.

About the Number of Convex Portions

In the above-mentioned guide 3, a number of the convex portions 14 aresequentially provided in the Y direction at the same pitch as the lenspitch of the lenticular lens 7. However, the guide 3 may not have theshape.

FIG. 11A is an explanatory view of a first modified example of thenumber of convex portions. As illustrated in FIG. 11A, even in a casewhere the convex portion 14 has a singular number, when the convexportion 14 is formed along the transport direction (in a directionperpendicular to the plane of FIG. 11A), the guide 3 can transport thelens sheet L in the transport direction while restricting it in the Ydirection.

FIG. 11B is an explanatory view of a second modified example of thenumber of convex portions. As illustrated in FIG. 11B, a plurality ofthe convex portions 14 may extend at the same pitch as the lens pitch pof the lenticular lens 7.

FIG. 11C is an explanatory view of a third modified example of thenumber of convex portions. As illustrated in FIG. 11C, a plurality ofthe convex portions 14 may extend at an interval which is an integermultiple of the lens pitch p of the lenticular lens 7.

FIG. 11D is an explanatory view of a fourth modified example of thenumber of convex portions. In a case where a plurality of the convexportions 14 are provided in the guide 3, the interval therebetween doesnot need to necessarily be uniform, and the interval between the convexportions 14 may be the lens pitch p or integer multiples of the lenspitch p of the lenticular lens 7.

In addition, in FIGS. 11A to 11D, the shape of the convex portion 14 iscylindrical, however, may employ other shape as described above. Here,detailed description thereof will be omitted.

Formation Position of Convex Portion (1)

FIG. 12A is a top plan view of the guide of FIG. 6C. The convex portion14 is formed at a portion hatched vertically in FIG. 12A. Theabove-mentioned guide 3 is provided with the convex portions 14 over theentire surface of the guide 3. However, places where the convex portions14 are provided may not need to necessarily be the entire surface of theguide 3.

FIG. 12B is an explanatory view of a first modified example of aformation position of the convex portions. In a case where a pluralityof sizes of the lens sheet L on which the recording apparatus 100 canperform recording exist, the convex portion 14 may be formed inalignment with a minimum recording width. For example, in a case whererecording is performed on the lens sheets L of card size to A4 size, theconvex portion 14 may be formed at a position where the lens sheet Lhaving the card size which is the minimum recording width passes.Accordingly, even though the lens sheet L with any size is transported,at least a part of the lens sheet L passes through the convex portionformation position, and skewing of the lens sheet L at that time isprevented.

In addition, in a configuration in which the recording apparatus 100transports the lens sheet L so that a position of a right end of thelens sheet L with any size is the same, the convex portion 14 is formedat the position as illustrated in FIG. 12B. In a configuration in whichthe recording apparatus 100 transports the lens sheet L so that thecenter of the lens sheet L with any size is the same, the hatchedportion of FIG. 12B may be at the center.

FIG. 12C is an explanatory view of a second modified example of theformation position of the convex portions. In the case of FIG. 12B, thelens sheet L with A4 size is transported, a frictional force is exertedon the side where the convex portion 14 is formed during thetransportation, it is difficult to transport the lens sheet L with goodprecision. Here, in this modified example, the convex portion 14 isformed on the left as well as on the right in the figure. Therefore,when the lens sheet L of A4 size is transported, the frictional force isexerted on both sides of the lens sheet L, thereby enabling the lenssheet L to be transported with good precision. In addition, the convexportion 14 may be formed in alignment with a position of a left end ofeach regular size during transportation so that the frictional force isexerted to both sides of the lens sheet L during the transportation ofthe lens sheets L with other regular sizes.

Formation Position of Convex Portion (2)

The recording apparatus 100 may perform recording on a paper in additionto the lens sheet L. When the recording apparatus 100 applies a pressingforce to the paper on the guide 3, there is a concern that a mark fromthe convex portion 14 may remain on the paper. Particularly, in a casewhere the convex portion 14 is formed only on a part of the guide 3 (forexample, in the case of the guide 3 illustrated in FIG. 11A or 12B),when a pressing force is applied to the paper, concentrated load isexerted on the paper, and there is a concern that marks from the convexportion 14 may remain on the paper.

Therefore, the position in the Y direction of the lens sheet L duringthe recording on the lens sheet L and the position in the Y direction ofthe paper during the recording on the paper may be changed.

FIG. 13A is a view of the guide viewed in the transport direction, FIG.13B is a schematic explanatory view of a transport position of the lenssheet, and FIG. 13C is a schematic explanatory view of a transportposition of a normal sheet. In the figure, although the shapes or thelike of the lens sheet L and the convex portion 14 are different fromactual ones, they are employed for the convenience of the description.

As illustrated in the figure, when the position in the Y direction ofthe lens sheet L during the recording on the lens sheet L and theposition in the Y direction of the paper during the recording on thepaper S are changed, the mark from the convex portion 14 does not remainon the paper S. In other words, the convex portion 14 of the guide 3 isprovided at a position at which the lens sheet L passes through and thepaper S does not pass through.

In addition, in order to change the position in the Y direction of thelens sheet L or the paper S during the transportation, a transportposition switching mechanism may be provided in a transport mechanism.Otherwise, a feed tray may be configured to switch between accommodationpositions in the Y direction of media (the lens sheet L or the paper S)in the feed tray when the lens sheet L or the paper S is accommodated inthe feed tray (for example, see FIG. 19B), and the transport mechanismmay be configured to transport the medium from the feed tray only in thetransport direction as it is.

Modified Examples of Pressing Roller About Configuration

In the embodiment described above, the transport roller 4 or the roller24 other than the transport roller 4 is configured as the pressingroller for pressing the lens sheet L against the guide 3 (in thefollowing description, both the transport roller 4 and the pressingroller 24 may be called a “pressing roller”). Here, a pressing elementfor pressing the lens sheet L against the guide 3 may not be rotatablelike a roller. For example, the pressing element may be made of alow-friction member so that the pressing element does not rotate and thelens sheet L slides between the pressing element and the guide 3. Inaddition, the pressing element may not have a shape like the roller.

About Arrangement

In the recording apparatus 100 of FIG. 3, the transport roller 4 whichis the pressing roller has a width greater than that of the lens sheetL. However, the pressing roller may have a width smaller than that ofthe lens sheet L.

Since the pressing roller presses the lens sheet L against the guide 3in order to prevent skewing of the lens sheet L, the pressing roller maybe opposed to at least the position where the convex portion 14 of theguide 3 is formed.

FIG. 14 is an explanatory view of an example of a pressing roller forthe guide of FIG. 12C. As described above, in a case where a pluralityof formation positions of the convex portions 14 exist, the pressingrollers may be provided to be opposed to the convex portion formationpositions. Of course, even in the case of FIG. 12C, a length of thepressing roller may be longer than the width of the lens sheet L.

About Surface Shape

Concaves and Convexes may be formed on a surface of the above-mentionedpressing roller.

FIG. 15A is an explanatory view of a modified example of the pressingroller provided with convex portions on its surface. The convex portion44 of the pressing roller may be provided at a position opposed to theconvex portion 14 of the guide 3. Therefore, an interval between theconvex portions 44 of the pressing roller may be the same as the lenspitch p or integer multiples of the lens pitch p. Since the convexportion 44 of the pressing roller is at the position opposed to theconvex portion 14 of the guide 3, when a pressing force is applied atthe position of the VC-VC cross-section of FIG. 5A, the peak of the lenssheet L presses the valley of the guide 3 strongly, and skewing can beeasily corrected.

FIG. 15B is an explanatory view of another modified example of thepressing roller provided with convex portions on its surface. The convexportion 44 of the pressing roller in FIG. 15B is provided at a positionopposed to a location between the convex portions 14 of the guide 3. Theinsertion of the peak of the lens sheet L into the valley of the guide 3from the state as illustrated in FIG. 5C causes skewing of the lenssheet L to be corrected. Therefore, the position of the convex portion44 of the pressing roller is more advantageous in FIG. 15B as comparedwith in FIG. 15A.

In addition, in the case where the pressing roller is provided with theconvex portion 44, an elastic member such as roller may be used so thatthe convex portion 44 of the pressing roller is deformable.

About Pressing Force of Pressing Roller

The recording apparatus 100 may perform recording on a paper as well ason the lens sheet L. In the recording apparatus 100, when a pressingforce is exerted to the paper on the guide 3, there is a concern that amark from the convex portion 14 may remain on the paper.

Therefore, when recording is performed on the lens sheet L, the pressingforce of the pressing roller may be strengthened, and when recording isperformed on the paper, the pressing force of the pressing roller may beweakened. In this case, an adjustment mechanism for adjusting theposition of the shaft of the pressing roller is provided, and acontroller may control the adjustment mechanism depending on the type ofthe medium to be recorded.

In addition, rather than to adjust the strength of the pressing force,in the case of recording on the lens sheet L, the pressing roller may beused, and in the case of recording on the paper, the pressing roller maynot be used. In this case, a transferring mechanism for controlling thetransfer (use/nonuse) of the pressing roller is provided, so that thecontroller may control the transferring mechanism of the pressing rollerdepending on the type of the recording medium.

About Permission of Rotation of Lens Sheet by Pressing Roller

As described above with reference to FIG. 5A, when skewing of the lenssheet L is corrected, the lens sheet L is rotated around the verticaldirection as an axis. Accordingly, it is preferable that the pressingroller be configured so that the lens sheet L can be easily rotated.

FIG. 16A is an explanatory view of a first modified example of thepressing roller. This pressing roller is rotatable about the x mark inthe figure by a supporting unit (not shown). In addition, when skewingof the lens sheet L is corrected, the peak of the lens sheet L isinserted between the convex portions 14 of the guide 3 so as to decreasethe extension of the spring element (denoted by reference numeral 4A ofFIG. 6A or reference numeral 24A of FIG. 6B) that generates the pressingforce of the pressing roller, that is, the pressing force. Accordingly,when skewing of the lens sheet L is corrected, the pressing roller thatis rotated along with the lens sheet L returns to its original position.In other words, it is preferable that the pressing force of the springelement be adjusted as described above.

FIG. 16B is an explanatory view of a second modified example of thepressing roller. The pressing roller has a smaller length as comparedwith the pressing roller of FIG. 16A. As such, with the smaller length,a frictional force exerted on the lens sheet L when the pressing rollerreturns to its original position after rotating may be small. Inaddition, in a case where a single pressing roller with such a smallerlength is provided, it is preferable that the pressing roller bedisposed at the center (the center of the width in the Y direction) ofthe lens sheet L. Accordingly, the pressing force exerted to the lenssheet L is not inclined.

FIG. 16C is an explanatory view of a third modified example of thepressing roller. The two pressing rollers are provided in the vicinityof both side ends of the lens sheet L. In addition, each pressing rolleris movable along the transport direction. Accordingly, when skewing ofthe lens sheet L is corrected, the one pressing roller is moved towardthe upstream side of the transport direction, and the other pressingroller is moved toward the downstream side of the transport direction toallow the rotation of the lens sheet L. As described above, one pressingroller may be supported to be movable symmetrically in the transportdirection.

In addition, the configuration of the pressing roller for facilitatingthe rotation of the lens sheet L is not limited to the above-mentionedconfiguration as long as the surface of the lens sheet L is made of alow-friction member.

Position Adjustment of Guide

The guide 3 may need to be mounted in the recording apparatus 100 byadjusting the direction of the convex portion 14 to be in the transportdirection. Here, an adjust method used for mounting the guide 3 will bedescribed.

FIG. 17 is an explanatory view of an image for inspection.

An image CM for inspection is an image having a plurality of lines Ln.The central line LA of the plurality of lines Ln is a line along thetransport direction on the image data. The lines Ln on the left and onthe right of the line LA of the image CM for inspection are lines formedby sequentially accumulating inclinations thereof by a predeterminedangle. For example, the lines Ln on the right side of the line LA areset to sequentially increase the inclination angles at every 0.01degrees clockwise toward the transport direction on the image data. Inaddition, the lines Ln on the left side of the line LA are set tosequentially increase the inclination angles at every 0.01 degreescounterclockwise toward the transport direction on the image data.

After the guide 3 is mounted in the recording apparatus 100, in order toinspect whether or not the generatrix direction of the convex portion 14of the guide 3 is aligned with the transport direction, the recordingapparatus 100 records the image CM for inspection on the lens sheet L.If the recording apparatus 100 is assembled in an ideal state, the lineLA is recorded on the lens sheet L while being aligned with thetransport direction. That is, if the recording apparatus 100 isassembled in the ideal state, the line LA will be recorded along thegeneratrix direction of the lens sheet L. After the recording apparatus100 records the image for inspection on the lens sheet L, an inspectorinspects the image for inspection from the side of the lenticular lens7.

FIG. 18 is an explanatory view of the image for inspection viewed fromthe lenticular lens. Among the plurality of lines Ln, the line Lnrecorded to be aligned with the generatrix direction of the lenticularlens 7 is recognizable by a single continuous line. On the other hand,the line Ln which is not recorded along the generatrix direction of thelenticular lens 7 is recorded over a plurality of the cylindrical lenses13 and it becomes a line cut discontinuously as shown by, for example, aline LC. If the recording apparatus 100 is assembled in the ideal state,the line LA is recognized as a single line. When the generatrixdirection of the convex portion 14 of the guide 3 is inclined withrespect to the transport direction, the line LA is recognized as cutlines, and another line LB corresponding to the inclination angle isrecognized as a single line.

Therefore, the inspector specifies a line that can be recognized as asingle line and adjusts a mounting angle of the guide 3 by the anglecorresponding to the line. For example, in this case, with regard to themounting angle of the current guide 3, the mounting angle of the guide 3is adjusted to be inclined at 0.03 degrees. Accordingly, the guide 3 ismounted in the recording apparatus 100 so that the convex portion 14 ofthe guide 3 is aligned with the transport direction.

In addition, in the description above, the inspector recognizes theimage for inspection which is recorded on the lens sheet L, however, thedescription is not limited thereto. For example, a scanner may read theimage for inspection which is recorded on the lens sheet L and determinethe mounting angle of the guide 3 on the basis of the reading result.

Modified Example of Feeding

In the embodiment described above, the lens sheet L is supplied from therear side of the recording apparatus 100. However, the configuration isnot limited thereto.

FIG. 19A is an explanatory view of a recording apparatus having an ASF(Auto Sheet Feeder). As such, the lens sheet L may be supplied from anupper side of the recording apparatus 100.

FIG. 19B is an explanatory view of a recording apparatus having anopenable and closable feed cassette on a front side of the recordingapparatus. In this case, the lens sheet L may be supplied from a lowerside of the recording apparatus.

In any case, since the lens sheet L is transported while being pressedon the guide 3 before the head 6 performs recording on the lens sheet L,the lens sheet L can be transported in the transport direction with goodprecision.

Other Embodiments

While the recording apparatus using the head has been described aboveaccording to the embodiment, the embodiment is provided for easyunderstanding of the invention and is not intended to limit theinvention. Modifications and Improvements can be made without departingfrom the spirit and scope of the invention, and needless to say thatequivalent matters are included in the invention.

About Pressing Member

In the embodiment described above, the transport roller 4 or thepressing roller 24 other than the transport roller 4 is used as thepressing member for pressing the lens sheet L against the guide 3.However, when the lens sheet L is supplied to the recording apparatuswhile the lens sheet L is pressed against the guide 3 by, for example, afinger, skewing of the lens sheet L can be prevented and corrected eventhrough the pressing roller is not provided.

1. A recording apparatus comprising: a transport mechanism thattransports a recording medium having a lenticular lens in a transportdirection; and a guide that includes a convex portion formed along thetransport direction and guides the recording medium in the transportdirection by allowing the convex portion to come in contact with thelenticular lens.
 2. The recording apparatus according to claim 1,further comprising: a pressing member that presses the recording mediumagainst the guide.
 3. The recording apparatus according to claim 2,wherein the pressing member exerts a pressing force on the recordingmedium which is being transported in the transport direction.
 4. Therecording apparatus according to claim 2, wherein a transport rollerthat is rotated to transport the recording medium in the transportdirection serves as the pressing member.
 5. The recording apparatusaccording to claim 2, wherein the transport mechanism has a transportroller that is rotated to transport the recording medium in thetransport direction, and the pressing member is provided on an upstreamside of the transport direction from the transport roller.
 6. Therecording apparatus according to claim 2, wherein the transportmechanism has a transport roller that is rotated to transport therecording medium in the transport direction, and the pressing member isprovided between a recording position on a downstream side of thetransport direction from the transport roller and the transport roller.7. The recording apparatus according to claim 1, wherein a length in thetransport direction of the guide is shorter than a length in thetransport direction of the recording medium.
 8. The recording apparatusaccording to claim 1, wherein an end surface in the transport directionof the guide is an inclined surface, and when an upper end of therecording medium being transported toward the guide comes in contactwith the inclined surface, the inclined surface guides the upper endtoward a side where the convex portion of the guide is formed.
 9. Therecording apparatus according to claim 1, wherein an end portion of theconvex portion on an upstream side of the transport direction isnarrowed as it goes to the upstream side of the transport direction. 10.The recording apparatus according to claim 1, wherein the guide has aplurality of the convex portions, and wherein the plurality of theconvex portions extend at an interval which is an integer multiple of alens pitch of the lenticular lens.
 11. The recording apparatus accordingto claim 1, wherein the guide is used for guiding the recording mediawith a plurality of sizes, and the convex portion is formed at aposition where the recording medium with the minimum size passesthrough.
 12. The recording apparatus according to claim 1, wherein, whenthe recording medium having the lenticular lens is to be recorded, therecording medium is transported to pass through a portion where theconvex portion is formed, and when a recording medium without alenticular lens is to be recorded, the recording medium is transportedto pass through a portion where the convex portion is not formed.
 13. Atransport method comprising: allowing a convex portion formed along atransport direction to come in contact with a lenticular lens of arecording medium having the lenticular lens; and transporting therecording medium in the transport direction while allowing the convexportion to come in contact with the lenticular lens.